Cold Electroweak Baryogenesis from Standard Model CP-violation
Who: Anders Tranberg (Helsinki)
When: Thursday, April 15, 2010 at 12:30
Where: The CP³ meeting room
Abstract: The origin of the observed matter-antimatter asymmetry in the
Universe must be sought in high-energy processes within the first second
after the Big Bang. Scenarios of this “Baryogenesis” within the Standard
Model of particle physics has hit two stumbling blocks: 1) CP-violation is
too small at high (electroweak scale) temperatures; and 2) the electroweak
phase transition is too weak to provide the necessary departure from
thermal equilibrium.
We consider an alternative scenario, Cold Electroweak Baryogenesis, where
the electroweak transition at the same time provides post-inflationary
reheating. In this case, neither 1) nor 2) apply, and we demonstrate by
direct numerical lattice simulations that the observed asymmetry can be
reproduced, including only Standard Model CP-violation.
Media
Slides from the talk.